import java.util.Scanner;

public class T {

    static int count=0;
    public static void main1(String[] args) throws InterruptedException {
        Object o=new Object();
        Thread t1=new Thread(()->{

            for (int i=0;i<5000;i++){
                count++;
            }


        });


        Thread t2=new Thread(()->{

            for (int i=0;i<5000;i++){



                    count++;


            }


        });

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println(count);
    }


    static int flag=0;

    public static void main(String[] args) throws InterruptedException {
        Object o=new Object();

        Thread t1=new Thread(()->{
            while (flag==0){


            }

        });


        Thread t2=new Thread(()->{

            Scanner sc=new Scanner(System.in);

            flag=sc.nextInt();



        });

        t1.start();
        t2.start();
//        t1.join();
//        t2.join();

//        System.out.println(count);
    }
}


